(async () => {
    const status = document.querySelector('.js-status');
    status.textContent = 'Looking up Fediverse profile...';

    let url = null;
    try {
        const response = await fetch(`${location.protocol}//${FEDI_INSTANCE}/.well-known/webfinger?format=json&resource=acct:${FEDI_USERNAME}@${FEDI_INSTANCE}`);
        const webfinger = await response.json();

        if(typeof webfinger === 'object') {
            if(Array.isArray(webfinger.links))
                for(const link of webfinger.links)
                    if(typeof link === 'object' && link.rel === 'http://webfinger.net/rel/profile-page' && typeof link.href === 'string') {
                        url = link.href;
                        break;
                    }

            if(typeof url !== 'string' && Array.isArray(webfinger.aliases))
                for(const alias of webfinger.aliases)
                    if(typeof alias === 'string') {
                        url = alias;
                        break;
                    }
        }
    } catch(ex) {
        status.style.color = 'red';
        status.textContent = `Could not complete Webfinger lookup! ${ex}`;
        return;
    }

    if(typeof url !== 'string' || (!url.startsWith('https://') && !url.startsWith('http://'))) {
        status.style.color = 'red';
        status.textContent = 'Could not find an acceptable profile URL.';
        return;
    }

    status.textContent = `Redirecting to ${url}...`;
    location.replace(url);
})();